US20050023915A1 - Magnetic brake for powered window covering - Google Patents
Magnetic brake for powered window covering Download PDFInfo
- Publication number
- US20050023915A1 US20050023915A1 US10/862,745 US86274504A US2005023915A1 US 20050023915 A1 US20050023915 A1 US 20050023915A1 US 86274504 A US86274504 A US 86274504A US 2005023915 A1 US2005023915 A1 US 2005023915A1
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- United States
- Prior art keywords
- motor
- assembly
- magnets
- drive structure
- powered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
- E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
- E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
- E06B9/32—Operating, guiding, or securing devices therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/106—Structural association with clutches, brakes, gears, pulleys or mechanical starters with dynamo-electric brakes
Definitions
- the present invention relates generally to motorized window coverings, awnings, security screens, projection screens, and the like.
- the present assignee has provided several systems for either lowering or raising a window covering, or for moving the slats of a window covering between open and closed positions, under control of a hand-held remote or other control device.
- These systems include a motor that is coupled through gears to the window covering activation mechanism. When the motor is energized in response to a user command signal, the activation mechanism moves the window covering.
- Such assemblies are disclosed in U.S. Pat. No. 6,433,498, incorporated herein by reference.
- the present assignee has also provided systems for determining the position of the window coverings based on counting motor pulses, and for braking the motor from turning when it is not energized. By knowing the position of the window coverings, features such as automatic repositioning the window covering to a preset position can be provided.
- the present invention likewise provides structure and methods for braking an object in the absence of power while minimizing the effects of the brake during motor operation.
- one or more permanent magnets are disclosed that are juxtaposed with the rotor to generate a magnetic field which interferes with the rotor slots and thereby creates an extra reluctance torque on the motor shaft.
- the extra reluctance torque establishes a static brake, to hold the rotor from undesirably turning under the weight of the window covering when the motor is deenergized.
- the present invention recognizes that even though the braking field does not unduly affect motor operation when the motor is energized, it is possible to even further reduce brake drag on the motor when it is operating.
- a powered assembly includes an object that can be moved between a first configuration and a second configuration.
- the object may be selected from the group consisting of window coverings, awnings, skylight coverings, curtains, and screens.
- a motor is provided, and an actuator is coupled to the motor and the object to move the object when the motor is energized.
- First and second magnets are juxtaposed with the rotating member and are magnetically coupled thereto. The first magnet is oriented with its north pole toward the rotating member and the second magnet is oriented with its south pole toward the rotating member.
- the magnets can be disk-shaped and can be mounted on a housing of the motor side by side each other on the housing.
- DC batteries can be the sole source of power for the motor.
- the braking magnets may be parallelepiped shaped. Shallow recesses may be formed in the housing of the motor in which the braking magnets can be disposed to shorten the distance between the magnets and the motor core and, hence, strengthen the braking power of the magnets.
- a concentrator bar can be placed over the top of the braking magnets to close the magnetic field outside the motor and, hence, to concentrate the braking field within the motor.
- a drive assembly for a movable object including a rod includes an electrically-powered drive structure couplable to the rod to move the object when the drive structure is energized.
- the drive structure has a rotating member.
- First and second braking magnets are closely spaced from the rotating member and are oriented with the north pole of the first magnet being substantially co-planar with the south pole of the second magnet.
- a method for operating an object that can be moved between a first configuration and a second configuration, with the object being selected from the group consisting of window coverings, awnings, skylight coverings, curtains, and screens includes providing a drive structure and coupling the drive structure to the object such that the object is moved when the drive structure is energized.
- the method also includes closely juxtaposing at least first and second magnets with the drive structure. Using the magnets, the drive structure is braked when the drive structure is not energized.
- the magnets are oriented such that when the drive structure is energized, the average magnetic field within the drive structure is at a null. That is, when the motor is energized, little or no back electromotive force (emf) is created because the effect of the field created by the braking magnets on the rotor during operation has a null average value.
- FIG. 1 is a perspective view of a window covering actuator, shown in one intended environment, with portions of the head rail cut away;
- FIG. 2 is a perspective view of a first embodiment of the motor showing disk-shaped braking magnets
- FIG. 3 is a perspective view of a second embodiment of the motor showing parallelepiped shaped braking magnets
- FIG. 4 is a perspective view of a third embodiment of the motor showing braking magnets in shallow recesses that have been formed in the housing of the motor;
- FIG. 5 is a perspective view of a fourth embodiment of the motor showing braking magnets and a magnetic concentrator.
- a motorized window covering is shown, generally designated 10 , that includes an actuator such as a rotatable rod 12 of a window covering 14 , such as but not limited to a shade assembly having raisable (by rolling up) and lowerable (by rolling down, or unrolling) shade 16 .
- the tilt rod 12 is rotatably mounted by means of a block 18 in a head rail 20 of the window covering 14 .
- the principles herein apply to a wide range of window coverings and other objects that are to be moved by motors.
- the invention applies to raisable and lowerable pleated shades and cellular shades such as those commonly marketed under the trade names “Silhouette”, “Shangri-La”, etc. as well as to projector screens, awnings, etc. that can be raised and lowered.
- the rod 12 may be a roll-up rod of a shade, awning, or projector screen, or a tilt rod of a horizontal (or vertical) blind, or other like operator.
- the window covering 14 is mounted on a window frame 22 to cover a window 24 , and the rod 12 is rotatable about its longitudinal axis.
- the rod 12 can engage a user-manipulable baton (not shown).
- the shade 16 raises or lowers between an open configuration and a closed configuration.
- FIG. 1 shows that the actuator 10 can include a control signal generator, preferably a signal sensor 26 , for receiving a user command signal.
- the user command signal is generated by a hand-held user command signal generator 28 , which can be an infrared (IR) remote-control unit or a radio frequency (RF) remote-control unit.
- the user command signal may be generated by any other means of communication well known in the art, such as by manipulable manual switches 29 .
- the user command signals can include open, close, raise, lower, and so on.
- An electronic circuit board 30 can be positioned in the head rail 20 and can be fastened to the head rail 20 , e.g., by screws (not shown) or other well-known method.
- the preferred electronic circuit board 30 includes a microprocessor for processing the control signals.
- FIG. 1 shows that a small, lightweight electric motor 32 is coupled to a gear enclosure 34 , preferably by bolting the motor 32 to the gear enclosure 34 .
- the gear enclosure 34 is keyed to the rod 12 , so that as the gears in the gear enclosure 34 turn, the rod 12 rotates.
- the motor 32 is electrically connected to the circuit board 30 .
- one or more (four shown in FIG. 1 ) primary dc batteries 36 can be mounted in the head rail 20 and connected to the circuit board 30 .
- the batteries 36 are the sole source of power for the motor, although the present invention can also be applied to powered shades and other objects that are energized from the public ac power grid.
- a user can manipulate the signal generator 28 to generate a signal that is sensed by the signal sensor 26 and sent to signal processing circuitry in the circuit board 30 .
- the electrical path between the batteries 34 and the motor 32 is closed to energize the motor 32 and move the window covering open or closed in accordance with the signal generated by the signal generator 28 , under control of the processor on the electronic circuit board 30 .
- the braking magnets disclosed below advantageously brake the motor from turning under the weight of the window covering 14 .
- the motor 32 includes a motor housing 42 inside of which a rotor 44 may rotate.
- the rotor 44 may have, e.g., three poles.
- First and second permanent braking magnets 46 , 48 are closely juxtaposed with the motor.
- the non-limiting magnets are disk-shaped with opposing magnetic poles for each magnet being established by the flat faces of the disk.
- the magnets 46 , 48 are attached to the housing 42 on a flat portion thereof by, e.g., solvent bonding the magnets to the housing 42 , with the magnets being positioned side by side each other.
- the first magnet 46 is oriented with its south pole “S” against the housing 42 and, hence, facing the rotor 44 , while the second magnet 48 is oriented with its north pole “N” against the housing 42 .
- the north pole “N” of the magnet 48 is substantially co-planar with the south pole “S” of the magnet 46 .
- the magnets 46 , 48 are magnetically coupled to the rotor 44 sufficiently to stop it from rotating when the motor 32 is deenergized. However, when the motor 32 is energized, the average magnetic field effect on the rotor generated by the magnets 46 , 48 is at a null, thereby causing little or no drag on the rotor 44 as it rotates.
- FIG. 3 shows an alternate embodiment having a motor 50 on which is mounted braking magnets 52 with opposed polarities as shown.
- the braking magnets 52 shown in FIG. 3 can be parallelepiped shaped.
- FIG. 4 shows another alternate embodiment having a motor 54 on which is mounted braking magnets 56 with opposed polarities as shown.
- the braking magnets 56 shown in FIG. 4 can be disk shaped as shown or they can have other shapes (e.g., they can be parallelepiped shaped.)
- shallow recesses 58 that are preferably configured to match the contours of the braking magnets 56 are formed in the housing of the motor (but not through the case).
- FIG. 5 shows yet another alternate embodiment having a motor 60 on which is mounted braking magnets 62 with opposed polarities as shown.
- the braking magnets 62 shown in FIG. 5 can be disk shaped as shown or they can have other shapes (e.g., they can be parallelepiped shaped.)
- a magnetic concentrator 64 such as an elongated ferromagnetic bar, can be placed on top of the braking magnets 62 to sandwich the magnets 62 between the concentrator 64 and motor 60 and thereby close the magnetic field beyond the braking magnets opposite the motor 60 . This serves to strengthen the magnetic braking field inside the motor, permitting the use of smaller magnets if desired.
- the concentrator 64 can have rounded ends as shown to match the contours of the braking magnets 62 in the event that the braking magnets 62 are disk shaped.
- the length of the non-limiting concentrator can equal the diameters of the braking magnets plus the distance between the braking magnets as shown.
Abstract
Description
- This is a continuation-in-part of co-pending U.S. patent application Ser. No. 10/445,149, filed on May 23, 2003 titled “Braking System for Powered Window Covering” and co-pending U.S. patent application Ser. No. 10/786,351, filed Feb. 25, 2004 titled “Piezo-Based Encoder with Magnetic Brake for Powered Window Covering” from which priority is claimed and which are incorporated herein by reference.
- The present invention relates generally to motorized window coverings, awnings, security screens, projection screens, and the like.
- The present assignee has provided several systems for either lowering or raising a window covering, or for moving the slats of a window covering between open and closed positions, under control of a hand-held remote or other control device. These systems include a motor that is coupled through gears to the window covering activation mechanism. When the motor is energized in response to a user command signal, the activation mechanism moves the window covering. Such assemblies are disclosed in U.S. Pat. No. 6,433,498, incorporated herein by reference.
- The present assignee has also provided systems for determining the position of the window coverings based on counting motor pulses, and for braking the motor from turning when it is not energized. By knowing the position of the window coverings, features such as automatic repositioning the window covering to a preset position can be provided. The present invention likewise provides structure and methods for braking an object in the absence of power while minimizing the effects of the brake during motor operation.
- In the parent application, one or more permanent magnets are disclosed that are juxtaposed with the rotor to generate a magnetic field which interferes with the rotor slots and thereby creates an extra reluctance torque on the motor shaft. The extra reluctance torque establishes a static brake, to hold the rotor from undesirably turning under the weight of the window covering when the motor is deenergized.
- While effective, the present invention recognizes that even though the braking field does not unduly affect motor operation when the motor is energized, it is possible to even further reduce brake drag on the motor when it is operating.
- A powered assembly includes an object that can be moved between a first configuration and a second configuration. The object may be selected from the group consisting of window coverings, awnings, skylight coverings, curtains, and screens. A motor is provided, and an actuator is coupled to the motor and the object to move the object when the motor is energized. First and second magnets are juxtaposed with the rotating member and are magnetically coupled thereto. The first magnet is oriented with its north pole toward the rotating member and the second magnet is oriented with its south pole toward the rotating member.
- The magnets can be disk-shaped and can be mounted on a housing of the motor side by side each other on the housing. DC batteries can be the sole source of power for the motor. Or, the braking magnets may be parallelepiped shaped. Shallow recesses may be formed in the housing of the motor in which the braking magnets can be disposed to shorten the distance between the magnets and the motor core and, hence, strengthen the braking power of the magnets. In addition, a concentrator bar can be placed over the top of the braking magnets to close the magnetic field outside the motor and, hence, to concentrate the braking field within the motor.
- In another aspect, a drive assembly for a movable object including a rod includes an electrically-powered drive structure couplable to the rod to move the object when the drive structure is energized. The drive structure has a rotating member. First and second braking magnets are closely spaced from the rotating member and are oriented with the north pole of the first magnet being substantially co-planar with the south pole of the second magnet.
- In still another aspect, a method for operating an object that can be moved between a first configuration and a second configuration, with the object being selected from the group consisting of window coverings, awnings, skylight coverings, curtains, and screens, includes providing a drive structure and coupling the drive structure to the object such that the object is moved when the drive structure is energized. The method also includes closely juxtaposing at least first and second magnets with the drive structure. Using the magnets, the drive structure is braked when the drive structure is not energized. On the other hand, the magnets are oriented such that when the drive structure is energized, the average magnetic field within the drive structure is at a null. That is, when the motor is energized, little or no back electromotive force (emf) is created because the effect of the field created by the braking magnets on the rotor during operation has a null average value.
- The details of the present invention, both as to its construction and operation, can best be understood in reference to the accompanying drawings, in which like numerals refer to like parts, and which:
-
FIG. 1 is a perspective view of a window covering actuator, shown in one intended environment, with portions of the head rail cut away; -
FIG. 2 is a perspective view of a first embodiment of the motor showing disk-shaped braking magnets; -
FIG. 3 is a perspective view of a second embodiment of the motor showing parallelepiped shaped braking magnets; -
FIG. 4 is a perspective view of a third embodiment of the motor showing braking magnets in shallow recesses that have been formed in the housing of the motor; and -
FIG. 5 is a perspective view of a fourth embodiment of the motor showing braking magnets and a magnetic concentrator. - Referring initially to
FIG. 1 , a motorized window covering is shown, generally designated 10, that includes an actuator such as arotatable rod 12 of a window covering 14, such as but not limited to a shade assembly having raisable (by rolling up) and lowerable (by rolling down, or unrolling)shade 16. As shown, thetilt rod 12 is rotatably mounted by means of ablock 18 in ahead rail 20 of the window covering 14. - While a roll-up shade is shown, it is to be understood that the principles herein apply to a wide range of window coverings and other objects that are to be moved by motors. For example, the invention applies to raisable and lowerable pleated shades and cellular shades such as those commonly marketed under the trade names “Silhouette”, “Shangri-La”, etc. as well as to projector screens, awnings, etc. that can be raised and lowered. Moreover, while needed less in applications that require only tilting slats such as in horizontal blinds, the invention may also apply to these systems. Thus, for example, the
rod 12 may be a roll-up rod of a shade, awning, or projector screen, or a tilt rod of a horizontal (or vertical) blind, or other like operator. It is thus to be further understood that the principles of the present invention apply to a wide range of window coverings and other objects including, but not limited to the following: vertical blinds, fold-up pleated shades, roll-up shades, cellular shades, skylight covers, etc. Powered versions of such shades are disclosed in U.S. Pat. No. 6,433,498, incorporated herein by reference. - In the non-limiting illustrative embodiment shown, the window covering 14 is mounted on a
window frame 22 to cover awindow 24, and therod 12 is rotatable about its longitudinal axis. Therod 12 can engage a user-manipulable baton (not shown). When therod 12 is rotated about its longitudinal axis, theshade 16 raises or lowers between an open configuration and a closed configuration. -
FIG. 1 shows that theactuator 10 can include a control signal generator, preferably asignal sensor 26, for receiving a user command signal. Preferably, the user command signal is generated by a hand-held usercommand signal generator 28, which can be an infrared (IR) remote-control unit or a radio frequency (RF) remote-control unit. Or, the user command signal may be generated by any other means of communication well known in the art, such as by manipulablemanual switches 29. The user command signals can include open, close, raise, lower, and so on. - An
electronic circuit board 30 can be positioned in thehead rail 20 and can be fastened to thehead rail 20, e.g., by screws (not shown) or other well-known method. The preferredelectronic circuit board 30 includes a microprocessor for processing the control signals. -
FIG. 1 shows that a small, lightweightelectric motor 32 is coupled to agear enclosure 34, preferably by bolting themotor 32 to thegear enclosure 34. Thegear enclosure 34 is keyed to therod 12, so that as the gears in thegear enclosure 34 turn, therod 12 rotates. - It is to be understood that the
motor 32 is electrically connected to thecircuit board 30. To power themotor 32, one or more (four shown inFIG. 1 )primary dc batteries 36, such as type AA alkaline batteries or Lithium batteries, can be mounted in thehead rail 20 and connected to thecircuit board 30. Preferably, thebatteries 36 are the sole source of power for the motor, although the present invention can also be applied to powered shades and other objects that are energized from the public ac power grid. - As set forth in the above-referenced U.S. Patent, a user can manipulate the
signal generator 28 to generate a signal that is sensed by thesignal sensor 26 and sent to signal processing circuitry in thecircuit board 30. In turn, the electrical path between thebatteries 34 and themotor 32 is closed to energize themotor 32 and move the window covering open or closed in accordance with the signal generated by thesignal generator 28, under control of the processor on theelectronic circuit board 30. When the motor is deenergized, the braking magnets disclosed below advantageously brake the motor from turning under the weight of the window covering 14. - Now referring to
FIG. 2 , in one non-limiting implementation themotor 32 includes amotor housing 42 inside of which arotor 44 may rotate. Therotor 44 may have, e.g., three poles. First and secondpermanent braking magnets magnets housing 42 on a flat portion thereof by, e.g., solvent bonding the magnets to thehousing 42, with the magnets being positioned side by side each other. - In accordance with present principles, the
first magnet 46 is oriented with its south pole “S” against thehousing 42 and, hence, facing therotor 44, while thesecond magnet 48 is oriented with its north pole “N” against thehousing 42. Stated differently, the north pole “N” of themagnet 48 is substantially co-planar with the south pole “S” of themagnet 46. - With this structure, the
magnets rotor 44 sufficiently to stop it from rotating when themotor 32 is deenergized. However, when themotor 32 is energized, the average magnetic field effect on the rotor generated by themagnets rotor 44 as it rotates. -
FIG. 3 shows an alternate embodiment having amotor 50 on which is mountedbraking magnets 52 with opposed polarities as shown. Thebraking magnets 52 shown inFIG. 3 can be parallelepiped shaped. -
FIG. 4 shows another alternate embodiment having amotor 54 on which is mountedbraking magnets 56 with opposed polarities as shown. Thebraking magnets 56 shown inFIG. 4 can be disk shaped as shown or they can have other shapes (e.g., they can be parallelepiped shaped.) In any case,shallow recesses 58 that are preferably configured to match the contours of thebraking magnets 56 are formed in the housing of the motor (but not through the case). With this structure, the distance between themagnets 56 and the core of the motor is shortened and, hence, the braking force of the magnets on the motor strengthened. -
FIG. 5 shows yet another alternate embodiment having amotor 60 on which is mountedbraking magnets 62 with opposed polarities as shown. Thebraking magnets 62 shown inFIG. 5 can be disk shaped as shown or they can have other shapes (e.g., they can be parallelepiped shaped.) In any case, amagnetic concentrator 64, such as an elongated ferromagnetic bar, can be placed on top of thebraking magnets 62 to sandwich themagnets 62 between the concentrator 64 andmotor 60 and thereby close the magnetic field beyond the braking magnets opposite themotor 60. This serves to strengthen the magnetic braking field inside the motor, permitting the use of smaller magnets if desired. Theconcentrator 64 can have rounded ends as shown to match the contours of thebraking magnets 62 in the event that thebraking magnets 62 are disk shaped. The length of the non-limiting concentrator can equal the diameters of the braking magnets plus the distance between the braking magnets as shown. - While the particular MAGNETIC BRAKE FOR POWERED WINDOW COVERING as herein shown and described in detail is fully capable of attaining the above-described aspects of the invention, it is to be understood that it is the presently preferred embodiment of the present invention and thus, is representative of the subject matter which is broadly contemplated by the present invention, that the scope of the present invention fully encompasses other embodiments which may become obvious to those skilled in the art, and that the scope of the present invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” All structural and functional equivalents to the elements of the above-described preferred embodiment that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the present claims. Moreover, it is not necessary for a device or method to address each and every problem sought to be solved by the present invention, for it is to be encompassed by the present claims. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element herein is to be construed under the provisions of 35 U.S.C. section 112, sixth paragraph, unless the element is expressly recited using the phrase “means for.”
Claims (32)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/862,745 US6967418B2 (en) | 2003-05-23 | 2004-06-07 | Magnetic brake for powered window covering |
PCT/IB2005/001520 WO2005121490A1 (en) | 2004-06-07 | 2005-05-19 | Magnetic brake for powered window covering |
AU2005252451A AU2005252451B2 (en) | 2004-06-07 | 2005-05-19 | Magnetic brake for powered window covering |
CN2005800185651A CN1965142B (en) | 2004-06-07 | 2005-05-19 | Electric component and method for operating object movable between a first and a second position |
EP05740467.5A EP1753930B8 (en) | 2004-06-07 | 2005-05-19 | Magnetic brake for powered window covering |
US11/223,186 US7259485B2 (en) | 2003-05-23 | 2005-09-09 | Magnetic brake for window covering powered by DC motor |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/445,149 US6794778B1 (en) | 2003-05-23 | 2003-05-23 | Braking system for powered window covering |
US10/786,351 US7002310B2 (en) | 2004-02-25 | 2004-02-25 | Piezo-based encoder with magnetic brake for powered window covering |
US10/862,745 US6967418B2 (en) | 2003-05-23 | 2004-06-07 | Magnetic brake for powered window covering |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/445,149 Continuation-In-Part US6794778B1 (en) | 2003-05-23 | 2003-05-23 | Braking system for powered window covering |
US10/786,351 Continuation-In-Part US7002310B2 (en) | 2003-05-23 | 2004-02-25 | Piezo-based encoder with magnetic brake for powered window covering |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/223,186 Continuation-In-Part US7259485B2 (en) | 2003-05-23 | 2005-09-09 | Magnetic brake for window covering powered by DC motor |
Publications (2)
Publication Number | Publication Date |
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US20050023915A1 true US20050023915A1 (en) | 2005-02-03 |
US6967418B2 US6967418B2 (en) | 2005-11-22 |
Family
ID=34968489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/862,745 Expired - Lifetime US6967418B2 (en) | 2003-05-23 | 2004-06-07 | Magnetic brake for powered window covering |
Country Status (5)
Country | Link |
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US (1) | US6967418B2 (en) |
EP (1) | EP1753930B8 (en) |
CN (1) | CN1965142B (en) |
AU (1) | AU2005252451B2 (en) |
WO (1) | WO2005121490A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2967440B1 (en) | 2010-11-15 | 2012-12-21 | Somfy Sas | DEVICE FOR MANEUVERING A BUILDING FLAP OF A BUILDING AND METHOD FOR OPERATING SUCH A DEVICE |
CA2907143A1 (en) | 2013-03-15 | 2014-09-18 | Springs Window Fashions, Llc | Window covering motorized lift and control operating system |
US9869124B2 (en) * | 2014-04-08 | 2018-01-16 | David R. Hall | Motorized gearbox assembly with through-channel design |
FR3039340B1 (en) * | 2015-07-23 | 2019-07-12 | Bubendorff | DEVICE FOR BRAKING AND IMMOBILIZING A ROTOR OF A SYNCHRONOUS ROTATING MACHINE. |
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- 2005-05-19 CN CN2005800185651A patent/CN1965142B/en active Active
- 2005-05-19 AU AU2005252451A patent/AU2005252451B2/en not_active Ceased
- 2005-05-19 WO PCT/IB2005/001520 patent/WO2005121490A1/en active Application Filing
- 2005-05-19 EP EP05740467.5A patent/EP1753930B8/en active Active
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US5467266A (en) * | 1991-09-03 | 1995-11-14 | Lutron Electronics Co., Inc. | Motor-operated window cover |
US5184660A (en) * | 1991-11-01 | 1993-02-09 | Verosol Usa Inc. | Window blind activator |
US5228491A (en) * | 1992-04-03 | 1993-07-20 | General Clutch Corporation | Monocontrol venetian blind |
US5444339A (en) * | 1993-06-11 | 1995-08-22 | Harmonic Design, Inc. | Mini-blind actuator |
US5848634A (en) * | 1996-12-27 | 1998-12-15 | Latron Electronics Co. Inc. | Motorized window shade system |
US6095223A (en) * | 1997-03-03 | 2000-08-01 | Rossini; Mauro | Actuation unit for venetian blinds or the like |
US6332491B1 (en) * | 1999-10-13 | 2001-12-25 | Finvetro S.R.L. | Actuation assembly for venetian blinds or the like inside double-glazing units |
US6837295B2 (en) * | 2000-06-22 | 2005-01-04 | Zhongming Wang | Magnetic transmission for an adjustable curtain disposed in a double pane window |
US6714733B2 (en) * | 2001-07-23 | 2004-03-30 | Nidec Copal Corporation | Step motor with interpole pair stabilizing rest position |
US6870338B2 (en) * | 2002-02-01 | 2005-03-22 | Harmonic Design, Inc. | Magnetic encoder for powered window covering |
US6924615B2 (en) * | 2002-02-01 | 2005-08-02 | Somfy Sas | Magnetic encoder for powered window covering |
Also Published As
Publication number | Publication date |
---|---|
CN1965142B (en) | 2010-06-16 |
US6967418B2 (en) | 2005-11-22 |
WO2005121490A1 (en) | 2005-12-22 |
AU2005252451B2 (en) | 2010-05-13 |
EP1753930B8 (en) | 2017-11-08 |
EP1753930B1 (en) | 2017-09-13 |
CN1965142A (en) | 2007-05-16 |
EP1753930A1 (en) | 2007-02-21 |
AU2005252451A1 (en) | 2005-12-22 |
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